DNA

  • Gregor Mendel

    Gregor Mendel

    He did an experiment using peas that led to the discovery of genetics and how certain traits can be dominant.
  • Friedrich Miescher

    Friedrich Miescher

    He discovered a substance containing both phosphorus and nitrogen in the nuclei of white blood cells found in pus.
  • Thomas Hunt Morgan

    Thomas Hunt Morgan

    He discovered a linear arrangement of the genes in chromosomes.
  • Frederick Griffith

    Frederick Griffith

    He experimented with mice and realized that one virus may have passed on the viral gene. He figured that this was caused by the passing of inheritance.
  • Erwin Chargaff

    Erwin Chargaff

    He noticed a pattern in four different bases. He took samples of DNA of different cells and found that the amount of adenine was almost equal to the amount of thymine, and that the amount of guanine was almost equal to the amount of cytosine.
  • Oswald Avery

    Oswald Avery

    He found the inheritance molecule, which was DNA, after continuing with Griffith’s experiment.
  • Hershey and Chase

    Hershey and Chase

    The results that Hershey and Chase obtained indicated that the viral DNA, not the protein, is its genetic code material.
  • Rosalind Franklin

    Rosalind Franklin

    She tried to crystalize a DNA molecule to run an X-ray pattern. They discovered that the DNA had an X helix shape.
  • Maurice Wilkins

    Maurice Wilkins

    He worked with Rosalind to crystalize a DNA molecule to run an X-ray pattern. They discovered that the DNA had an X Helix shape.
  • James Watson & Francis Crick

    James Watson & Francis Crick

    These two found out the structure and appearance of DNA.
  • Frederick Sanger

    Frederick Sanger

    He figured out the determination of the structure of insulin and other proteins.
  • John Sulston

    John Sulston

    He realized that certain cells in the lineage always died at a certain time by what seemed to be a programmed cell death.